20 



INSECT ARCHITECTURE. 



When an insect first issues fi-om the egg, it is called 

 by naturalists larva, and, popularly, a caterpillar, a 

 grub, or a maggot. The distinction, in popular lan- 

 guage, seems to be, that caterpillars are produced 

 Irom the eggs of moths or butterflies; grubs, from 

 the eggs of beetles, bees, wasps, Stc; and maggots 

 (which are without feet) from blow-flies, house-tlies, 

 cheese-flies, &c., though this is not very rigidly ad- 

 hered to in common parlance. JVIaggots are also 

 sometimes called ^vorins, as in the instance of the 

 meal-worm; but the common earth-worm is not a 

 larva, nor is it by modern naturalists ranked among 

 insects. 



Larvae are remarkably small at first, but grow- 

 rapidly The full-grown caterpillar of the goat-moth 

 {Cossus ligniperda) is thus seventy-two thousand 

 limes heavier than when it issues from the ess\ and 



